1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sineoko [7]
3 years ago
10

A machine increase the rate of doing ______.

Chemistry
1 answer:
GarryVolchara [31]3 years ago
5 0
Doing work “easier “
Called “ fingerstick”
You might be interested in
The most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to
diamong [38]

Answer:

0.693kg of CuFeS2 is needed to produce 240 grams of Cu.

Explanation:

In 1 mole of CuFeS2 is associated 1 mole of Cu.

Molar mass of CuFeS2 = 183.5 g/mol

Molar mass of Cu = 63.5g/mol

No of moles of copper present in 240g of chalcopyrite = 240/63.5 = 3.779moles

we know

1 mole of Cu → 1 mole of CuFeS2

in 3.779 moles of Cu → 3.779 moles of CuFeS2

3.779 moles of CuFeS2 = 3.779 * 183.5 = 693.45grams

CuFeS2 in kg = 0.693kg

5 0
3 years ago
Which one of these situations would have higher density water? Water with a lower salt content Water at the equator Water near w
Nady [450]

Explanation:

water near where a river enters the ocean is having a higher density.

coz, ocean water has salt which increases water's density

6 0
3 years ago
Read 2 more answers
How are earthquakes and tsunamis created?
frez [133]

Earthquakes are created when tectonic plates rub, push, or pass each other. Tsunamis are made by earthquakes on the sea floor.

8 0
4 years ago
The ionization energies required to remove successive electrons from one mole of calcium atoms are 590 kJ/mol, 1145 kJ/mol, 4912
Alexxx [7]

Answer:

Ca^2+

Explanation:

As we know, more energy is required to remove an electron from a positively charged ion than is required to remove an electron from a neutral atom. Hence, the second ionization energy of calcium is greater than its first ionization energy.

However, the third and fourth ionization energies of calcium are much higher than the second ionization energy because they involve removal of electrons from an inner filed shell. This process requires a lot of energy and is often not feasible.

Hence, the most common ion of calcium must be Ca^2+ where only two electrons are removed from calcium.

8 0
3 years ago
What is the concentration of HNO3 if 9.80×10−2 mol are present in 705 mL of the solution?
nydimaria [60]

Answer:

The answer to your question is 0.13 M

Explanation:

Data

[HNO₃] = ?

moles of HNO₃ = 9.8 x 10⁻²

volume = 705 ml

Process

1.- Convert volume to milliliters

                 1000 ml ------------------ 1 L

                    705 ml ------------------ x

                    x = (705 x 1) / 1000

                    x = 705 / 1000

                    x = 0.75 L

2.- Calculate the molarity

Molarity = moles / volume

Molarity = 9.8 x 10⁻² / 0.75

Molarity = 0.13

4 0
3 years ago
Other questions:
  • What is a manipulated variable
    15·1 answer
  • What is the total number of electrons shared in a double covalent bond?
    5·1 answer
  • Which of the following statements is true of enzymes
    7·1 answer
  • I WILL GIVE U BRAINLIEST
    6·2 answers
  • Which of the following is a nonrenewable resource?
    8·2 answers
  • Which of the following is a norm or value that sports may socialize children about
    6·1 answer
  • Lucy got a new car for her birthday so she went 12 km east and then 8 km South. What is her distance
    14·1 answer
  • What is the role of an R group in an amino acid?
    12·2 answers
  • Where does the 'Equiv' come from?
    10·1 answer
  • How many moles of ammonia could be obtained from a maximum of 5.0 moles of nitrogen​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!